A display system includes a display device, a driving circuit, a flexible printed circuit (FPC), a charge pump circuit and a control circuit. The driving circuit is disposed on the display device, for driving the display device. The FPC is externally coupled to the display device. The charge pump circuit is disposed on the FPC, for generating at least an output voltage to the driving circuit. The control circuit is disposed on the display device and coupled to the driving circuit, for generating a plurality of control signals to control the charge pump circuit. The charge pump circuit has a plurality of control ports coupled to the control circuit for receiving the control signals generated from the control circuit, respectively.
Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A display system, comprising: a display device, which comprises indium tin oxide (ITO) resistors; a driving circuit, disposed on the display device, for driving the display device; a flexible printed circuit (FPC), externally coupled to the display device; a charge pump circuit, disposed only on the FPC, for generating at least an output voltage to the driving circuit; and a control circuit, disposed on the display device and coupled to the driving circuit, for generating a plurality of control signals to control the charge pump circuit; wherein the charge pump circuit has a plurality of control ports coupled to the control circuit for receiving the control signals generated from the control circuit, respectively; and the charge pump circuit is disposed only on the FPC and is coupled to each of the driving circuit and the control circuit through the FPC without being directly connected to any of the driving circuit and the control circuit, so as to prevent a voltage converting efficiency of the charge pump circuit from being limited by the ITO resistors of the display device.
A display system includes a display panel with indium tin oxide (ITO) resistors, a driver chip on the display panel, a flexible printed circuit (FPC) board connected to the display panel, a charge pump circuit ONLY on the FPC to boost voltage for the driver chip, and a controller on the display panel to send control signals to the charge pump. The charge pump's control inputs connect to the controller. The charge pump is ONLY on the FPC and connected to the driver and controller ONLY through the FPC, which prevents the ITO resistors from reducing the charge pump's voltage conversion efficiency.
2. The display system of claim 1 , wherein the charge pump circuit comprises: a charge pump unit, for generating at least the output voltage to the driving circuit; and a processing unit, coupled between the control ports and the charge pump unit, for receiving the control signals generated from the control circuit via the control ports and controlling the charge pump unit according to the control signals.
The display system described previously, where a display panel with indium tin oxide (ITO) resistors connects to a driver chip, which receives power from a charge pump circuit ONLY on an FPC board. A controller on the display panel sends control signals to the charge pump circuit through the FPC. The charge pump circuit includes a voltage boosting unit and a processor. The processor receives control signals from the controller via control ports, and then the processor controls the voltage boosting unit based on those control signals.
3. The display system of claim 2 , wherein the processing unit performs an exclusive or (XOR) operation upon the received control signals to generate a clock signal to the charge pump unit.
The display system featuring a charge pump circuit includes a voltage boosting unit and a processor, where the processor receives control signals from a controller via control ports. The processor performs an exclusive OR (XOR) operation on the received control signals to generate a clock signal. This clock signal is then provided to the voltage boosting unit to control its operation in the described display system, where a display panel with indium tin oxide (ITO) resistors connects to a driver chip, which receives power from the charge pump circuit ONLY on an FPC board.
4. The display system of claim 2 , wherein the processing unit selectively generates data signals or command signals to the charge pump unit according to the received control signals.
The display system featuring a charge pump circuit includes a voltage boosting unit and a processor, where the processor receives control signals from a controller via control ports. The processor selectively generates either data signals or command signals to the voltage boosting unit based on the received control signals. This selection determines the type of operation performed by the voltage boosting unit in the described display system, where a display panel with indium tin oxide (ITO) resistors connects to a driver chip, which receives power from the charge pump circuit ONLY on an FPC board.
5. The display system of claim 2 , wherein the processing unit selectively generates data signals or command signals to the charge pump unit by comparing logic values of the received control signals.
The display system featuring a charge pump circuit includes a voltage boosting unit and a processor, where the processor receives control signals from a controller via control ports. The processor selectively generates either data signals or command signals to the voltage boosting unit by comparing the logic values (high/low, 1/0) of the received control signals. This comparison determines whether data or a command is sent to the voltage boosting unit, influencing its behaviour in the described display system, where a display panel with indium tin oxide (ITO) resistors connects to a driver chip, which receives power from the charge pump circuit ONLY on an FPC board.
6. The display system of claim 1 , wherein the display device is a thin-film transistor liquid crystal display (TFT-LCD) device, and the driving circuit is a TFT-LCD driver IC.
The display system, where a display panel with indium tin oxide (ITO) resistors connects to a driver chip, which receives power from a charge pump circuit ONLY on an FPC board, specifically uses a thin-film transistor liquid crystal display (TFT-LCD) as the display panel. The driver chip is a TFT-LCD driver IC. A controller on the display panel sends control signals to the charge pump circuit through the FPC. The charge pump is ONLY on the FPC and connected to the driver and controller ONLY through the FPC, which prevents the ITO resistors from reducing the charge pump's voltage conversion efficiency.
7. A display system, comprising: a display device, which comprises indium tin oxide (ITO) resistors; a driving circuit, disposed on the display device, for driving the display device; a flexible printed circuit (FPC), externally coupled to the display device; a charge pump circuit, disposed only on the FPC, for generating at least an output voltage to the driving circuit; and a control circuit, disposed on the display device and coupled to the driving circuit, for generating a control signal to control the charge pump circuit; wherein the charge pump circuit has a first control port coupled to the control circuit for receiving the control signal generated from the control circuit, and a second control port for receiving a reference voltage; and the charge pump circuit is disposed only on the FPC and is coupled to each of the driving circuit and the control circuit through the FPC without being directly connected to any of the driving circuit and the control circuit, so as to prevent a voltage converting efficiency of the charge pump circuit from being limited by the ITO resistors of the display device.
A display system includes a display panel with indium tin oxide (ITO) resistors, a driver chip on the display panel, a flexible printed circuit (FPC) board connected to the display panel, a charge pump circuit ONLY on the FPC to boost voltage for the driver chip, and a controller on the display panel to send a control signal to the charge pump. The charge pump has a first control input for the control signal and a second input for a reference voltage. The charge pump is ONLY on the FPC and connected to the driver and controller ONLY through the FPC, which prevents the ITO resistors from reducing the charge pump's voltage conversion efficiency.
8. The display system of claim 7 , wherein the charge pump circuit comprises: a charge pump unit, for generating at least the output voltage to the driving circuit; and a processing unit, coupled to the first control port, the second control port and the charge pump unit, for receiving the control signal generated from the control circuit via the first control port and the reference voltage via the second control port, and controlling the charge pump unit according to the control signal and the reference voltage.
The display system described previously, where a display panel with indium tin oxide (ITO) resistors connects to a driver chip, which receives power from a charge pump circuit ONLY on an FPC board, receives a control signal from a controller on the display panel and a reference voltage through the FPC. The charge pump circuit includes a voltage boosting unit and a processor. The processor connects to the first control input (control signal), the second control input (reference voltage), and the voltage boosting unit. The processor controls the voltage boosting unit based on both the received control signal and the reference voltage.
9. The display system of claim 8 , wherein the processing unit provides a clock signal to the charge pump unit according to the control signal, and sets a pumping factor of the charge pump unit according the reference voltage.
In the display system featuring a charge pump circuit with a processor that controls a voltage boosting unit, the processor provides a clock signal to the voltage boosting unit based on the control signal received from the controller. Furthermore, the processor sets the pumping factor (the amount of voltage increase per cycle) of the voltage boosting unit according to the reference voltage in the display system, where a display panel with indium tin oxide (ITO) resistors connects to a driver chip, which receives power from the charge pump circuit ONLY on an FPC board.
10. The display system of claim 7 , wherein the reference voltage has a fixed voltage level.
In the display system where a charge pump circuit receives a reference voltage to control its operation, the reference voltage has a fixed voltage level. This fixed voltage provides a stable baseline for the charge pump's operation in the described display system, where a display panel with indium tin oxide (ITO) resistors connects to a driver chip, which receives power from the charge pump circuit ONLY on an FPC board.
11. The display system of claim 7 , wherein the display device is a thin-film transistor liquid crystal display (TFT-LCD) device, and the driving circuit is a TFT-LCD driver IC.
The display system, where a display panel with indium tin oxide (ITO) resistors connects to a driver chip, which receives power from a charge pump circuit ONLY on an FPC board, specifically uses a thin-film transistor liquid crystal display (TFT-LCD) as the display panel. The driver chip is a TFT-LCD driver IC. A controller on the display panel sends a control signal to the charge pump, which also uses a reference voltage. The charge pump is ONLY on the FPC and connected to the driver and controller ONLY through the FPC, which prevents the ITO resistors from reducing the charge pump's voltage conversion efficiency.
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January 21, 2010
July 9, 2013
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